i recently heard that the chances of a man passing on hiv to a women is greater then the chances of a women passing it on to a man, why is that.

Response from Dr. Jackson

Several studies indicate that HIV appears to be more easily transmitted through sexual intercourse from man to woman than vs versa. It is thought that the greater suface area of the vagina and the longer contact of HIV with the moist mucosal membrane of the vagina are partly responsible but no one knows for sure.

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